export function randomExtend(minNum, maxNum) {
  if (arguments.length === 1) {
    return parseInt(Math.random() * minNum + 1, 10)
  } else {
    return parseInt(Math.random() * (maxNum - minNum + 1) + minNum, 10)
  }
}

export function debounce(delay, callback) {
  let lastTime

  return function () {
    clearTimeout(lastTime)
    const [that, args] = [this, arguments]
    lastTime = setTimeout(() => {
      callback.apply(that, args)
    }, delay)
  }
}

export function observerDomResize(dom, callback) {
  const MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver
  const observer = new MutationObserver(callback)
  observer.observe(dom, { attributes: true, attributeFilter: ['style'], attributeOldValue: true })
  return observer
}

export function getPointDistance(pointOne, pointTwo) {
  const minusX = Math.abs(pointOne[0] - pointTwo[0])
  const minusY = Math.abs(pointOne[1] - pointTwo[1])
  return Math.sqrt(minusX * minusX + minusY * minusY)
}
